I suggest installing one thing at a time to isolate the point of bootloop.
Install i777-omni/slim/shostock (no gapps, no custom kernel).
-if bootloop, flash stock distribution as final test (a weak/damaged battery can cause a bootloop)
-if no bootloop, then wipe again and add gapps, but still no custom kernel
-if no bootloop, then add custom kernel
Originally Posted by Needle_Twist
I have a SII i777. I have been testing roms on the phone sense I bought it. I was testing C-ROM for Galaxy S2! [Android 4.4.4/Floating Multi-Window]. I was letting my phone charge. When I went to check the time I noticed it was in a boot loop. I booted into recovery formatted the normal stuff still boot loop. I ran Mr-Cook script rom whip, kernel whip reapplied the rom then the Gapp and then the shift kernel. Still boot loop. Please help i must be over looking something.